https://doi.org/10.1140/epjqt/s40507-022-00152-z
Research
Population transfer under local dephasing
1
Guangxi Key Laboratory of Optoelectronic Information Processing, School of Optoelectronic Engineering, Guilin University of Electronic Technology, 541004, Guilin, China
2
Division of Science and Technology, BNU-HKBU United International College, 519087, Zhuhai, China
3
Henan Key Laboratory of Quantum Information and Cryptography, 450000, Zhengzhou, Henan, China
4
Key Laboratory of Low-Dimensional Quantum Structures and Quantum Control of Ministry of Education, Department of Physics and Synergetic Innovation Center for Quantum Effects and Applications, Hunan Normal University, 410081, Changsha, China
c
xinweidu@uic.edu.cn
d
guochu604b@gmail.com
Received:
6
May
2022
Accepted:
17
November
2022
Published online:
29
November
2022
Stimulated Raman adiabatic passage is a well-known technique for quantum population transfer due to its robustness again various sources of noises. Here we consider quantum population transfer from one spin to another via an intermediate spin which is under dephasing noise. We obtain an analytic expression for the transfer efficiency under a specific driving protocol, showing that dephasing could reduce the transfer efficiency, but the effect of dephasing could also be suppressed with a stronger laser coupling or a longer laser duration. We also consider another commonly used driving protocol, which shows that this analytic picture is still qualitatively correct.
Key words: Stimulated Raman adiabatic passage / Population transfer / Coherent quantum control
© The Author(s) 2022
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